BANSE: REDESCRIPTIONS OF SOME SPECIES OF CHONE AND EUCHONE 



synonyms. The figure of the tips of the radioles 

 of C. cincta by Ushakov (1955, Figure 159 K) 

 clearly shows a feature very different from C. 

 infundihuliformis; it may be noted that Zachs 

 (1933) , while describing C. cincta, observed that 

 the gills are like those of C. infundibiUiformis. 

 The number of records for the long-known 

 C. mftmdibidiformis is very large. Lists by Mc- 

 intosh (1923), Pettibone (1954), and Hartman 

 (1969) may be consulted, but it must be noted 

 that most of the records cannot be evaluated 

 under the viewpoints presented here without the 

 specimens of the various authors. Therefore, 

 the list of synonyms on p. 461 has been kept 

 short. 



Regarding the distribution and synonymy of 

 C. infundihuliformis in the North Atlantic, Mc- 

 intosh (1916) was the first to emphasize the 

 difference between the abdominal uncini of 

 Greenlandic specimens (very small accessory 

 teeth, forming a straight line with the rostrum, 

 cf. Figure If) and those of southern forms (teeth 

 coarse, their tips lying on a convex line above 

 the continuation of the rostrum similar to Fig- 

 ure 3g) , thus implying that different forms are 

 involved. Most European records of C. infun- 

 dibuliformls will not be identifiable without the 

 authentic material of the several species; con- 

 fusion is possible with C. fauveli, C. normani, and 

 C. reayi, all described by Mcintosh, and C. unga- 

 vana Chamberlin. Fauvel (1927, p. 346) has 

 already suggested that C. reayi may belong to 

 Jasmineira Langerhans. 



From the description alone, it is certain that 

 most, if not all, of the material of Fauvel (1913, 

 1914) is not C. infundihuliformis. Mcintosh 

 (1916) even believed that Fauvel had before him 

 C. duneri, which is very diffierent from any of 

 the species listed in the previous paragraph. 

 All of Fauvel's drawings of abdominal uncini 

 show coarse accessory teeth not found in C. in- 

 fundihuliformis from Greenland. Also, Fauvel 

 (1913) stated that the teeth in some specimens 

 were arranged in one row only. Fauvel empha- 

 sized the variability within specimens of the ab- 

 dominal uncini (as well as of the tips of the 

 spatulate setae) for his material. The shape of 

 abdominal uncini, however, does not vary in C. 

 infundihuliformis. Similarly, Lukasch (1911, 



Plate 2, Figures 7 and 8) shows a conspicuous 

 divergence of the form of the anterior and pos- 

 terior abdominal uncini in material from the 

 Kola Fjord; as shown, this does not occur in 

 Greenlandic material. Also, drawings in Fauvel 

 (1927) do not refer to typical C. infundihuli- 

 formis. Further, Hartman's (1944b, Plate 23, 

 Figure 46) figure of an uncinus of C. infundihu- 

 liformis from the Swedish west coast resembles 

 that of C. fauveli; according to Eliason (1962, 

 see his remarks under C. duneri) , true C. infun- 

 dibuliformis is not found on that coast. Finally, 

 uncini vaguely similar to those of C. fauveli have 

 been drawn by Rioja and Lo Bianco (1931) for 

 Iberic material identified as C. infundihuliformis, 

 so that this record too is uncertain. 



CHONE PAUCIBRANCHIATA (KROYER) 



SABELLA PAUCIBRANCHIATA Kroyer, 

 1856, p. 22. 



Material studied: Holotype, from Finmark, 

 northern Norway (from label). ZMC. 



The original description was based on a single 

 specimen. The species has been regarded since 

 Malmgren (1866) as a junior synonym of C/iowe 

 infundihuliformis Kroyer. However, the holo- 

 type has ventral shields whereas C. i^ifimdibuli- 

 formis does not. The shields are especially visible 

 after using methyl green; the thorax laterally 

 does not stain. The synonymy of this old species 

 cannot be given without a thorough redescription 

 of other European forms: possibly, the species 

 is indeterminable. 



The mature specimen, with polygonal eggs of 

 about 50 jx diameter, is small, having a trunk 

 length of about 10 mm to which the branchial 

 crown adds about 3.5 mm. The greatest width 

 is slightly less than 1 mm. Approximately 45 

 abdominal setigers are present. As observed by 

 Kroyer (1856), the animal has three pairs of 

 branchia and some short nude filaments. The 

 length of the palmate membrane, which is now 

 torn, extended at least to one-third of that of 

 the branchial crown but not more than two- 

 thirds. The thoracic uncini are long-handled. 

 The first bundle of setae originates slightly more 

 dorsally than the notosetae of the second setiger, 



465 



